Loom picking mechanism



Dec. 5,1939. J. H. CHADBOURNE ET AL 2,487

LOOM PICKING MECHANISM Original Filed Oct. 19, 1936 2 Sheets-Sheet l eiifieyv/l g fiadzdzziwa 1939- J. H. CHADBOURNE ET AL 2,182,487

LOOM PICKING MECHANISM Original Filed Oct. 19, 1936 2 Sheets-Sheet 2 hif-zi 17;4? Q Jase DZ 1922624530267??? Patented Dec. 5, 1939 unrre L 0M PICKING MECHANISM necticut Refiled for abandoned application Serial No.

106,408, October 19, 1936.

This application March 4, 1939, Serial No. 259,932

3 Claims.

This application is a refiling of abandoned application Serial No. 106,408, filed October 19, 1936, entitled Loom picking mechanism.

Our invention relates to the picking mechanism 5 of a loom, and is directly more particularly to the element or elements thereof which connect the picking arm with the lug strap or picker stick.

The picking mechanism includes generally the picking arm or sweep arm, rocked either directly or indirectly by a picking shaft, which arm is bolted or otherwise pivotally connected with the inner end of the connecting or coupling member whose outer end is attached to the lug strap of the picker stick which impacts with and drives the shuttle under the influence of the swift and powerful strokes of the sweep arm. The action of the picking or sweep arm induces wear of the journal opening of the coupling member, and the hammering of the bolts enlarges the same, thus 20 necessitating frequent replacement of coupling members. This enlargement also causes splitting of the latter, and develops lost motion whereby the time of shuttle reciprocation is varied causing derangement of operation and loss of time.

The jar and vibration induced by the forcible contact of the picker stick with the reciprocating shuttle are imparted to all the elements of the picker mechanism, andthe unyielding character 30 of the coupling members of metal or other hard material has a deteriorating efiect upon such materials.

Certain objects of our invention are to overcome the disadvantageous results above recited incident to connecting or coupling members heretofore produced; to prevent wear or enlargement of the journal opening as well as the mutilation of the area adjacent thereto; to prevent splitting or fracture of any portion of the device, as well 40 as to insure a slight degree of resilience in the coupling member to absorb the vibration and shocks incident to the operation of the picker mechanism; to impart lightness and toughness to the structure; to reduce the number of constituent 45 parts and to attain these ends with a simple and inexpensive device.

Other objects and advantages of our invention will be hereinafter adverted to.

To the above ends essentially our invention 50 consists in such parts and in such combinations of parts, and in such steps or succession of steps as fall within the scope of the appended claims.

In the accompanying drawings which form a part of this specification,

55 Figure l is a fragmentary elevation of our coupling member operatively connected-with the adjacent elements of a picking mechanism,

Figure 2, a plan view of a rectangular sheath or binding strip with filler cords resting loosely thereon in initial position,

Figure 3, an end elevation of the parts after the massing of the cords with the adhesive,

Figure 4, a similar elevation of the same after the binding step,

Figure 5, an end elevation of the compressing 1O mould with the bound parts exposed endwise therein,

Figure 6, a perspective view of the mould member after removal from the mould, and certain of the finishing operations,

Figure '7, a fragmentary side elevation of the complete coupling member, showing in section a bolt or lug mounted therein,

Figure 8, a top plan View of the coupling member,

Figure 9, a section taken on line 99 of Figure '7 omitting the bolt,

Figure 10, a section taken on line Hllil of Figure 8,

Figure 11, a top plan view of the binding strip, a modified form of cord filling resting flat there- Figure 12, an enlarged fragmentary detail of the cord filling shown in Figure 11,

Figure 13, a fragmentary side elevation of a modified form of our coupling operatively connecting the picking arm with the picker stick,

Figure 14, a plan of the coupling shown in Figure 13,

Figure 15 and 16, longitudinal sections taken on lines l5-l5 and I6l6 respectively of Figures 13 and 14 respectively, and

Figure 1'7, a transverse section of the same on line l'I-l| of Figure 14.

In the accompanying drawings Ell represents the picking arm, 2! the lug strap, and 23 the picker stick of any usual or preferred loom picker mechanism. Our novel coupling member 24 is illustrated in conjunction with these elements with its inner end portion connected by a bolt or lug 2 6 to the picking arm, and its outer end portion by a bolt 28 to the lug strap.

In constructing the member 24 a substantially rectangular wrapper 33 of canvas or a similar tough flexible material, resting fiat upon any suitable support, has placed thereon a layer 35 of filling material comprising a mass of cords numbering approximately twenty-five to the inch. Each cord 36 is disposed longitudinally of the 5 wrapper, as shown in Figure 3. The cords are composed of spun cotton or woolen fiber or staple.

An adhesive such as gelatinous glue is applied to the layer 35, which is then manually manipulated to impregnate the same with the glue and massed centrally and longitudinally of the wrapper as shown in Figure 3, an ample supply of the glue having been also applied to the exposed upper face of the wrapper 33. The filling 35 is next tightly rolled and bound in the wrapper whose longitudinal margins overlap each other, as shown at 37 in Figure 4. This resultant substantially cylindrical roll is sufiiciently impregnated with adhesive to be subject to transverse deformation under pressure.

The described package or roll is next placed in a mould 39 having a transversely rectangular moulding chamber and subjected to extreme pressure whereby the contents are compactly compressed into a solid mass. The conformation of the mould is such that the compressed member after removal comprises, as shown in Figure 6, a transversely oblong shank 43 having a rectangular head 44 of greater width than the maximum width of the shank, but of reduced thickness caused by oppositely disposed lateral depressions 45. The above described filling 35 extends throughout the length of the shank and head, everywhere surrounded by the sheath 33 except at the ends. A smooth hardly visible seam 41 extends the length of the shank and head along one of the broader sides. The described member is next thoroughly dried producing a tough and compact structure.

The coupling member 24 is completed by rectangular plates or layers of raw hide 48 fixed in the depressions 45 by four corner rivets 58 comprising shanks passing through transverse holes 52 and 53 in the head and plates respectively, heads 55 abutting against one plate, and end flanges 5i riveted over washers or rings 5! upon the other plate. The head 44 and plates 49 are provided centrally with registering circular openings 63 and 54 together constituting a journal opening 55 through which the belt or lug 26 passes.

A hole 56 cut transversely through the outer end portion of the coupler is adapted to receive the member 28 shown in Figure 1 therethrough.

In Figure 11 is shown resting upon the wrapper 33 a fabric sheet 68, composed of cords 69 loosely interwoven with a series of threads or filaments Hi, the cords extending longitudinally of the strip 33. The described fabric sheet 63 may be used instead of the cords 36 shown in Figure 2, and are manipulated and processed in the manner first above described.

The compact, compressed filling and sheath forms a tough and highly resisting body incapable of splitting and capable of a slight degree of yielding or elasticity under great stress. The longitudinal disposition of the cords especially strengthens the filling in the direction of the greatest strain.

The journal opening 55 is protected against wear or excessive knocking of the member journaled therein by reason of the excessive resistance of the portions of the raw hide plates or layers exposed within the opening.

The exposed outer faces of the plates form ample protection against gouging or lateral abrasion or any wear occasioned by contact with adjacent external elements. The accidental escape of the plates is prevented and the reduced portion of the sweep stick is transversely strengthened by the rivets. The constituent materials of the described coupling member renders its weight extremely light which is a desideratum in structures of this character.

In Figures 13 to 17 inclusive is shown a modification of our present invention wherein the connector element or coupling '14 of the pic-king mechanism includes a shank portion 15 and the terminal loop portion 76. The portion 15 is composed of transversely rectangular extended portions 1'! of the loop 76, the material of which is of like form in cross section, and whose adjacent inner faces bear against each other and, in this instance, have therebetween a film 18 of adhesive character.

The method of constructing the coupling or connecting member 14 resembles that employed in the construction of the member 24. A rectangular wrapper 80 of the same material as that of the wrapper 33, but of greater length, is tightly wrapped around a mass of longitudinally disposed filling cords 8| extending to the ends of the wrapper, of the same material as the cords 36, and similarly impregnated with gelatinous glue or other adhesive, as well as glued to the wrapper to form a cylindrical package or roll similar to that shown in Figure 4 and having a lapped longitudinal seam 33. In place of the filling cords 8| a filling material consisting of the fabric sheet 68, shown in Figure 12, may be employed.

The moist package or roll is next subjected to compression in an elongated mould similar to that described in connection with Figure 5 except that the transversely rectangular form of the moulding chamber is of uniform dimensions throughout its length.

The transversely rectangular rod is, while still in a moist condition withdrawn from the first mould, and shaped by suitable tools to the form shown in Figures 13 to 1'7, and then dried to a rigid and tough consistency.

The coupling member M is completed by rawhide plates 85 fixed to the outer lateral faces of the extended portions H at their outer ends by corner rivets 81 riveted over washers 8B. The shank elements and plates are provided respectively with circular openings ill and 93 to receive the bolt or lug 25 of the picking arm 20.

The member 14 may be made of any suitable material other than that described, which possesses the advantages of lightness, strength, and resistance to wear, although the preferred material is a built-up structure as described above.

The modified form of connector i4 while in cluding the described advantages of the connector 24 dispenses with the necessity of employing a lug strap 2| thus reducing the number of parts heretofore demanded.

We claim:

1. A picker stick coupling comprising a shank and. an integral head, said shank and head consisting of a continuous outer textile sheath and a continuous filler core of separate initially unbound parallel cords extending lengthwise of the coupling and impregnated with adhesive, said head having a journal opening extending laterally therethrough.

2. A picker stick coupling comprising a shank and an integral head, said shank and head consisting of a continuous outer textile sheath and a continuous filer core of separate initially unbound parallel cords extending lengthwise of the coupling and impregnated with adhesive, said head having a journal opening extending laterally therethrough and having parallel sides provided with guard plates.

3. A picker stick coupling comprising a shank, an integral loop, and an integral head, said shank, loop and head consisting of a continuous outer textile sheath and a continuous filler core of separate initially unbound parallel cords extending lengthwise of the coupling and irnp'regnated with adhesive, said head having a journal opening extending laterally therethrough.

JOSEPH H. CHADBOURNE. CHARLES A. BURDICK. 

